3. The I/O module
3-17
Festo P.BE-CB-COMP-EN en 1102d
3.6.1 Start/Stop mode
The controller of the CHB-C-X assumes that:
– the power supply for the CHB-C-X is applied
– the boot procedure has been completed (O/7 = HIGH)
– the signals for selecting the parts type are applied
(see Chapter 3.6.3).
The Checkbox is started with a signal sequence (pulse) at
pin I/6 LOW > HIGH > L OW and is stopped again with the
signal sequence LOW > HIGH > LOW (recommended pulse
duration 500 ms).
Pin
Signal sequence Significance
I/6 LOW > HIGH > LOW Starts the Checkbox
LOW > HIGH > LOW Stops the Checkbox
Tab. 3/7: Signal sequence with Start/Stop mode
With varying manual operation or control via the I/O module,
pressing the START/STOP button corresponds to the signal
change LOW > HIGH > LOW.
The modification of the operating status with Start or Stop is
sent to the controller via O/21.
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